一种应用于单相DVR的检测算法与仿真  

Algorithm and simulation to Detect Voltage for Single-phase Dynamic Voltage Restorer

作　　者：张国荣[1] 丁明[1] 梁海涛[1] 吕适翔 陈济良 徐华丽 

机构地区：[1]教育部光伏系统工程研究中心合肥工业大学能源研究所,合肥230009 [2]中国联合工程公司,浙江杭州310022

出　　处：《系统仿真学报》2007年第4期732-734,771,共4页Journal of System Simulation

基　　金：教育部高等学校博士学科点专项科研基金项目(20050359002)

摘　　要：动态电压恢复器(DVR)是改善电压质量的一种有力工具。在电网电压畸变的情况下,能否快速而准确地检测出电网电压的畸变量,将直接影响DVR的补偿效果。针对目前电压检测方法中存在锁相误差较大及滤波器延时的不足,在分析了常用的基于瞬时无功功率理论的dq0变换方法和用于单相电路的dq0变换方法的基础上,结合一种新颖的软件锁相环技术,提出一种适用于单相DVR的新型电压检测算法,该算法可以有效提高锁相精度并避免了滤波器的延时。基于MATLAB的仿真分析结果验证了这种方法的正确性和实时性。Dynamic Voltage Restorer （DVR） is a powerful equipment to improve the voltage quality. When the distortion of grid voltage occurs, how to detect the distortion rapidly and exactly will affect the performance of DVR directly. There are big phase-locked errors in current ways of detecting voltage and the time-delayed shortage in the filter used at present. To solve the problems above, the common dq0 transformation method was analyzed based on instantaneous reactive power theory and dq0 transformation method used in single-phase circuit. And with the new technique of software phase-locked loop, a novel algorithm of detecting voltage in single-phase DVR was proposed The algorithm can improve the accuracy of phase-locked effectively and avoid delaying time in filter. The real-time character and accuracy of the proposed method is validated through the simulation results based on MATLAB.

关 键 词：动态电压恢复器 单相 瞬时无功理论 软件锁相环 

分 类 号：TM761[电气工程—电力系统及自动化] TP391.9[自动化与计算机技术—计算机应用技术]